"Since he was born in Texas, we kind of want to do a cowboy-themed birthday party," Brewster told PEOPLE.

By peoplestaff225
July 02, 2014 11:00 AM

Jamie McCarthy/Wireimage

When it comes to her son Julian‘s first birthday party, Jordana Brewster is working fast and furiously to make the celebration special.

It’s only appropriate that the Dallas star, 34, would break out the 10-gallon hats, spurs and chaps for the occasion.

“Since he was born in Texas, we kind of want to do a cowboy-themed birthday party,” Brewster told PEOPLE at Tuesday’s Mr. Clean Summer Fashion Party. “I feel like it would be really cute.”

But don’t expect it to be an over-the-top event; Brewster is working hard to keep the party intimate, with only family and a few friends on the invitation list.

“We might have to borrow my sister’s yard because right now we’re in a rental,” says Brewster.

With the guest list done and the location all set up, there’s only one thing left to plan: the food.

“The question is, do we get the In-N-Out truck?” she jokes. “That’s more for the adults — it’s totally for the adults. But it’s so tempting!”

When it comes to Julian’s everyday meals, however, the health-conscious mom admits to being scared of feeding her son solid food.

“I basically steam first,” Brewster says of her cooking routine. “I’ll steam carrots, pear, spinach or kale, sweet potatoes — any variety of fruits and vegetables. Then I’ll put it in a blender. [I’m] not quite as good at feeding him solids because I get so scared.”

One thing she isn’t scared of? Letting her 9-month-old get messy — and creative! — for a little craft time. To celebrate husband Andrew Form‘s first Father’s Day, Brewster made big plans to go all out with a paint project, but jokes it didn’t exactly go as planned.

“When you’re a first time mom, you’re naive to that stuff, so I just did the finger prints and foot prints and I was like, ‘Oh, this will go so smoothly, I’ll do it singlehandedly,’ ” she recalls.

“I tried as hard as I could to get him to not make a fist, and by the time I was done, the card was a total mess, but Dad didn’t care. It was all over his foam tiles in his playroom, there was paint all over the place.”

— Katherine Foreman